Adjustable projector



Feb. 18, 1930. c. ANDREINO ADJUSTABLE PROJECTOR Filed Nov. 1928 2Sheets-Sheet 1 II m Attorneys Wm M.

Fb. 18, 1930. C. ANDREINO 1,747,279

ADJUSTABLE PROJECTOR Filed Nov. 28, 1928 2 Sheets-Sheet 2 nmum /IIIIIIL/ j {fi iz'ia %ys 12 Invento'r Patented Feb. 18, 1930 UNITEDSTATES PATENT OFFICE ADJUSTABLE PROJECTOR Application filed November 28,1928, Serial No. 322,462, and in Canada November 30, 1927.

The present invention relates to improvements in light projectingapparatus and has for its primary object to provide a projectingapparatus which can be conveniently adjusted to project the light beamat various angular positions.

A further object of the invention is the provision of an adjustableprojecting apparatus which can be accurately controlled from a distantcontrol position.

A further object of the invention is the provision of an adjustableprojecting apparatus which may be quickly and accurately adjusted toswing the projector lantern and focus the lamp.

Another object of the invention is the provision of a projectingapparatus having a distant control mechanism forelectrically swingingthe lantern in a vertical and horizontal plane.

Still another object of the invention is the provision of means forelectrically focusing the projector lamp.

A further object of the invention is the provision of a projectingapparatus of the above character which is compact and durable ofconstruction and which can be conveniently installed for operation.

Other objects and advantages of the invention will become apparent asthe description progresses.

In the accompanying drawings forming a part of this specification and inwhich like reference characters are employed to designate correspondingparts throughout the same Figure 1 is aside elevational View of theassembled apparatus,

Figure 2 is a diagrammatic illustration of the wiring connection,

Figure 3 is an enlarged transverse section through the switch panel,

Figure 4 is a perspective view of the lantern,

Figure 5 is a front view of the same partly in section,

Figure 6 is a vertical longitudinal sectional view through the lantern,

Figure '5 is a top plan view partly in section, and

Figure 8- is an enlarged plan View of an automatic switch.

Referring to the drawings, wherein for the purpose of illustration isshown a preferred embodiment of the invention, the 1111- meral 10generally designates a tubular support standard which is normallyarranged in a vertical position.

The upper end of the standard is journaled in a bearing collar 11adapted to rotatably support the standard 10 in vertical suspendedposition. This bearing is supported by a hanger 12 the upper end ofwhich is formed with a pair of spaced hooks 13 engageable with a cable14 or other supporting element. The lower portion of the hanger isprovided with a universal connection 15 from which is suspended an arm16 having its lower end rigidly secured to the bearing 11 by means of abracket 17 Secured to the lower portion of the standard 10 in spacedsuperposedpositions are a pair of brackets 18 adapted to support avertical gear frame 19 provided with a rectangular recess in its upperportion.

Rotatably connected with the gear tram 19 for vertical adjustablemovement is a lantern 20. This lantern embodies a longitudinalrectangular shaped casing 21 vertically elongatedvand provided with aninwardly offset angular flange 22 designed to snugly receive therein alens 23. The rear end of the casing is provided with a shutter 24:adjustable to permit suitable ventilation within the casing.

In the bottom of-the casing is formed a longitudinal guide member 25having channel shaped side edges 26. Slidably associated with the guidemember 25 for longitudinal adjustment in the casing is a lamp plate 27the side edges being downwardly ofl'set and formed to engage the channelshaped side edges of the guide member so that the plate 7 27 can beslidably actuated in the casing. The plate 27, forms a support for alamp socket 28 formedto receive a projecting lamp 29. Asshown toadvantage in Figure 6, a mirror 30 is supported in a vertical positionimmediately in the rear of the lamp by means of an angular bracket 31attached to the socket 28.

The lamp is longitudinally shifted in the casing through theinstrumentality of a threaded shaft 32 rotatably journaled in the bottomof the casing and engageable with a pair of flanges 33 secured to theforward and rear edges of the lamp plate 27 and formed with threadedopenings adapted to engage the shaft.

As it is intended to electrically operate the shaft 32, means areprovided for automatically disconnecting the shaft operating circuit atthe forward and rear terminal positions of the lamp, this being effectedby providing a pair of horizontally projecting threaded rods 34 fixed inparallel positions in the casing adapted to form adjustable guides for apair of terminal blocks From this construction, it is obvious that theexact positions of the blocks may be longitudinally varied in the casingand that the blocks may be locked in selected positions to limit thelongitudinal movement of the lamp. 7' 9 Each block carries a slidableswitch contact 36 urged outwardly by a. coiled spring 36, and having anoutwardly projecting portion directed toward the lamp engagcable with aninner resilient stationary contact 3'7. This switch is arranged so thatwhen the lamp reaches one of its end positions it will engage themovable contact 38 and slide the same with respect to the stationarycontact 37 so as to open the switch and automatically stop the operativemovement of the shaft 32.

Of course, when it is'desired to reverse the motor, the circuit that hasbeen opened by the switch just described must be, closed before the lampcan be shifted backward. To this effect, the knife switch 65 controllingthe focussing motor is equipped with a projecting fibre block adapted toclose a pair of contacts 66 and 67. As shown in the circuit diagram, thesaid contacts are connected in shunt with the lamp switch contacts 36and 37 so that when the knife switch 65 is thrown to the right thecontacts 66' and 67 will complete the broken circuit and allow of thefocussing motor 50 to be reversed when the knife switch 65 is pushed onfull.

Rigidly attached to the inner side of the lantern casing 21 in avertical position is a bevel gear 38 to the centre of which is secured ahorizontally projecting stub shaft 39. The

shaft 39 is journaled in a bearing formed in the lower portion of thegear frame 19 and secured against displacement by a nut. Thus thelantern is supported for vertical oscillating movement.

Rigidly secured about the bearing collar 11 and projecting laterally inhorizontal position therefrom is a platform 40 on the upper surface ofwhich are mounted a pair of spaced vertical bearing plates 41. Thecomplementary plates 41 are provided with opposed. openings formingbearings for a horizontal shaft 42 rotatably mounted therein. Fixed onone end of the shaft 42 is a worm wheel 43 arranged to mesh with a driveworm 44 mounted in and adapted to be rotatably driven by means of anelectric motor 45. On the opposite end of the shaft 42 is secured abevel pinion 46 in mesh with a relatively large horizontal bevel gear 47rigidly attached to the upper end of the standard 10. This constructionis designed to permit selective rotation of the standard by means of theelectric motor 45.

A second platform 48 is secured in horizontal position to theintermediate portion of the standard and is adapted to operativelysupport a pair of motors 49 and 50. A drive shaft 51 is mounted parallelwith and adjacent to the standard 10, the lower end being rotatablysupported in the upper bracket 18 and projecting through a sleeve formedin the upper portion of the gear frame 19 while the upper end of thedrive shaft projects through an opening in the platform 48 and is heldin position by a bearing collar secured thereon. A bevel pinion 52 isfixed on the lower end of the drive shaft 51 and meshes with the bevelgear 38. The upper end of the drive shaft 51 carries a horizontal gear53 rigidly attached to the shaft and in mesh with a complementary gear54 fixed on a vertical counter shaft supported in position by an angularbracket 55. A worm wheel 56 is secured on the counter shaft immediatelyabove the gear 54 and is arranged to mesh with a drive worm fixed on theouter end of the motor shaft of the drive motor 49. Upon operation ofthe motor 49, the shaft 51 and lantern gear 38 will be rotated by meansof the transmission gearing so as to tilt the lantern forwardly orrearwardly. The motor 50 is also formed with a drive worm arranged todrive a worm wheel 56 fixed on the upper end of a vertical shaft 57. Theshaft 57 is mounted for rotatable movement adjacent the standard andarranged so that its upper end projects through an opening in theplatform 48 while its lower end is journaled in a bracket 58. Detachablyconnected with the lower end of the shaft 57 and with the rear end ofthe threaded lantern shaft 32 is a flexible drive shaft 59. Thus, uponoperation of the motor 50, in forward or reverse movement, the focus ofthe light rays of the lantern can be altered to spread said rays orconcentrate the same into a light pencil.

' An important feature of the present invention resides in the provisionof a compact control unit which may be arranged in are mote positionfrom the apparatus and permit accurate control thereof. This controlunit embodies, in the present instance, an angular panel 60 to which areconnected three independent switch members pivotally mounted on thepanel. Each of the contact members are of double bladed form arranged toprovide a double throw for forward and reverse operation of therespective motors. In the present arrangement, the initial switch memberindicated at 61, is connected with the motor 50 by means of a conductor62. An auxiliary conductor 63 is associated with the conductor 62 andwith the automatic switch blocks in the lantern casing, the lower endsof the auxiliary conductors 63 being connected to terminals 64 mountedin the switch blocks. An intermediate switch member indicated at 65,controls the operation of the motor through the medium of a conductor66. In a similar manner, the switch member at the opposite end of thepanel designated at 67 controls the operation of the lantern tiltingmotor 49. The switch contacts are also connected with a main conductor68 which is adapted to be associated with an ordinary house socket. Thelamp 29 is connected with a conductor 69 which is connected with anindependent socket indicated at 70.

As clearly illustrated in the wiring diagram shown in Figure 2, the mainconductor 68 is connected with one of the pivot contacts of each switch.lVhen an individual v switch is swung in one direction into contact withthe stationary terminals, the motor connected with the switch will beoperated in one direction. When the switch is thrown into contact withthe terminal on the opposed side of the panel the operation of the motoris reversed. In the operation of the light focussing mechanism, when theswitch is thrown in one position to close the circuit the motor isoperated in one direction to move the lamp 29 forwardly in the casing sothat the projecting beam will diverge. In the event that the light ismoved forwardly to the end of its transversing movement, the socket 28will engage the movable contact 36 and force the same inwardly thusautomatically disconnecting the motor operating circuit. When the motoris reversed the circuit will be similarly automatically disconnectedwhen the socket engages the rear block 35 so as to avoid injury to themechanism. As clearly shown in Figure 3, the switch members are normallymaintained in an intermediate disconnected position by a pair ofcounteracting tension springs 71 secured to the outer edges of the paneland the switch.

In operation, the lamp 29 may be desirably focused by suitable operationof the switch 61 as described. lVhen it is desired to elevate or lowerthe light beam, the switch 67 is swung into the corresponding fixedcontacts to ro tate the motor 49 in its forwarder reversed movement.lVhen it is desired to swing the beam horizontally, the intermediateswitch is thrown into engagement with the fixed contacts to operate themotor 45 in forward 5 or reversed movement so as to rot-ate the tubularstandard 10in clockwise or'counter-clockwise direction. This will enablethe operator to accurately control and focus the projecting beam quicklyand accurately from an adjacent or remote position,

It is also within the contemplation of the present invention to provideauxiliary control circuits so that the pivoted switch members can beoperated by electromagnets to provide a dual distant control. Thisconstruction will permit the use of relatively small conductors for theoperation of the switches. I

It is to be understood that the form of my invention herein shown anddescribed is to be taken as a preferred example of the same, and thatvarious changes as to the shape, size,

and arrangement of parts may be resorted to without departing from thespirit of the invention or the scope of the subjoined claims. Havingthus described my invention, I

1. A projecting apparatus comprising a rotatably supported standard, anelectric motor adapted to rotate the standard, gearing interposedbetween the motor and the standard for rotatable operation of thestandard, a lantern pivotally connected with the lower portion of thestandard, an electric motor adapted for adjustment of the lantern,gearing interposed between the lantern and the motor adapted to permitoscillatory movement of the lantern upon operation of the motor, a thirdmotor for selectively adjusting the lamp inside the lantern, and aremote control unit for selectively operating the motors in forward orreversed operation.

2. A projecting apparatus comprising a rotatably supported standard, anelectric motor adapted to rotate the standard. gearing interposedbetween the motor and the standard for rotatable operation of thestandard, a lantern pivotally connected with the lower portion of thestandard, an electric motor adapted for adjustment of the lantern,gearing interposed between the lantern and the motor adapted to permitoscillatory move ment of the lantern upon operation of the motor, a lampsupport mounted for longitudinal sliding movement in the lantern, amotor for operatively actuating the said lamp support, a connectingshaft associated with the motor and threaded lamp actuating shaftadapted to rotate the threaded shaft upon operation of the motor tofocus the lamp support, and a control unit adapted to permit selectiveoperation of the respective motors.

3. A light projecting apparatus comprising a rotatable supportstandard,a hanger adapted to support the standard in vertical position, a lanternpivotally mounted at the lower end of the standard for verticaloscillating adjustment, a lamp support mounted for longitudinal slidingmovement in the lantern, a threaded shaft mounted in the lantern inoperative engagement with the lamp support, a standard rotating motor,gearing interposed between thesaid motor and standard for reversiblyrotating the said standard, a lantern oscillating motor, a gearinginterposed between the said lantern oscillating motor and lanternadapted to oscillate the lantern upon operation of the motor, a motorfor driving the threaded lamp support adjusting shaft, a flexible shaftdisposed be tween the said motor and the threaded shaft for rotatableoperation of the shaft, and a switch control unit adapted for selectiveoperation of the respective motors.

In witness whereof I have hereunto set my hand.

CHARLES ANDREINO.

